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6,948
RESULTS

Media Type
2
collections
5,985
texts
496
audio
389
movies
50
images
16
concerts
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Availability
6,679
Always Available
250
Available to Borrow
19
Waitlist
Year
43
2018
42
2017
50
2016
59
2015
97
2014
52
2013
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Topics & Subjects
1,518
Coal mines and mining
1,042
Coal
797
coal
782
DTIC Archive
610
COAL
401
NASA Technical Reports Server (NTRS)
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Collection
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Creator
782
defense technical information center
401
nasa technical reports server (ntrs)
220
alberta. energy resources conservation board
111
united states. bureau of land management
66
united states international trade commission
56
alex smith
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Language
6,120
English
52
French
48
German
9
Spanish
3
Chinese
3
Dutch
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